I don't even know where to start on this... Just got my passport a couple of years ago and international travel has become a much bigger part of my life.

I stumbled into a fantastic fare from Newark to Dusseldorf. My wife and I had no idea what we might do but bought tickets that straddle our anniversary (August 1st).

I'm trying to do everything from findgin a SIM card (with data) for our iPhones that will work acceptably (i.e. not a king's ransom) if we cross the border into Belgium, France and Austria to figuring out just what areas we can concentrate on. About the only thing we KNOW is that we're renting a car for the duration and staying at B&B's along the way.

We know we want to stay in the Black Forest for a bit and visit the castles near Fussen and do 'Bavaria' (with a side to Salzburg).

It was far easier to do a similar trip around Scotland a little over a year ago.

So... Are there recommendations for sites to help me narrow this down a bit? A Germany-centric site for B&B's that might not be known on this side of the pond? A collection of regionally-grouped "things to do" lists that might help us decide which areas stay, or go, or are "can't miss"?

Help!

Thanks in advance.